chore(a11y): pass a11y descriptions in svelte

packages/svelte/src/lib/container/SvelteFlow/SvelteFlow.svelte

@@ -70,6 +70,7 @@
     nodes = $bindable([]),
     edges = $bindable([]),
     viewport = $bindable(undefined),
+    a11yMessages,
     ...props
   }: SvelteFlowProps<NodeType, EdgeType> &
     Omit<HTMLAttributes<HTMLDivElement>, 'onselectionchange'> = $props();
@@ -217,6 +218,6 @@
     </Pane>
   </Zoom>
   <Attribution {proOptions} position={attributionPosition} />
-  <A11yDescriptions {store} />
+  <A11yDescriptions {store} a11yMessages={a11yMessages} />
   {@render children?.()}
 </Wrapper>

packages/svelte/src/lib/container/SvelteFlow/types.ts

@@ -20,7 +20,8 @@ import type {
   OnConnectEnd,
   OnReconnect,
   OnReconnectStart,
-  OnReconnectEnd
+  OnReconnectEnd,
+  a11yMessages
 } from '@xyflow/system';
 
 import type {
@@ -471,4 +472,9 @@ export type SvelteFlowProps<
     onselectionstart?: (event: PointerEvent) => void;
     /** This event handler gets called when the user finishes dragging a selection box */
     onselectionend?: (event: PointerEvent) => void;
+    /**
+     * Custom accessibility messages for screen readers and a11y features.
+     * Allows localization and customization of ARIA descriptions.
+     */
+    a11yMessages?: a11yMessages;
   };